Zuviston 10mg Tablet contains dydrogesterone, a synthetic progestogen structurally similar to natural progesterone, at a dose of 10mg per tablet. It is primarily indicated for the management of various gynecological conditions associated with progesterone deficiency, including menstrual disorders such as irregular menstruation, secondary amenorrhea, and dysfunctional uterine bleeding. Additionally, Zuviston is utilized in hormone replacement therapy to support luteal phase insufficiency and to prevent threatened or recurrent miscarriage in early pregnancy. The mechanism of action involves binding to progesterone receptors, thereby exerting progestational effects on the endometrium, promoting secretory transformation, and stabilizing the uterine lining. This helps restore normal menstrual cycles and supports pregnancy maintenance. Zuviston is administered orally, with dosage and duration tailored according to the specific clinical indication and patient response. It is generally well tolerated, but potential side effects may include nausea, headache, breast tenderness, and mild gastrointestinal disturbances. Contraindications include known hypersensitivity to dydrogesterone or any component of the formulation, active thromboembolic disorders, and hormone-dependent malignancies. Caution is advised in patients with liver impairment or a history of thromboembolism. Regular monitoring and consultation with a healthcare professional are recommended during therapy.